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IgA ½Åº´ÁõÀ» µ¿¹ÝÇÑ ÀÚ°¡¸é¿ª¼º °£¿°°ú ¿ø¹ß¼º ´ã°ü¼º °£°æº¯ÁõÀÇ Overlap Syndrome 1¿¹ A Case of Primary Biliary Cirrhosis-Autoimmune Hepatitis Overlap Syndrome associated with IgA Nephropathy

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Abstract

¼­·Ð
ÀÚ°¡¸é¿ª¼º °£¿°(autoimmune hepatitis: AIH)Àº ¿øÀÎ ºÒ¸íÀÇ ¸¸¼ºÀûÀÎ °£¼¼Æ÷ÀÇ ±«»ç¼º ¿°
ÁõÀ» ÀÏÀ¸Å°´Â ÁúȯÀ¸·Î Ç÷Áß¿¡ Ç×ÇÙÇ×ü³ª smooth muscle antibodies (SMA) µîÀÇ ÀÚ°¡Ç×
üµéÀÌ Æ¯Â¡ÀûÀ¸·Î ³ªÅ¸³ª¸ç ´Ù¸¥ ¸¸¼º °£ÁúȯÀÇ ¿øÀεéÀ» ¹èÁ¦Çϸé Áø´ÜÀÌ °¡´ÉÇÏ´Ù. µå¹°
°Ô´Â AIH°¡ antimitochondrial antibodies (AMA)°¡ °­¾ç¼ºÀ̸鼭 ¼Ò¾çÁõ, Ȳ´Þ µîÀÇ Áõ¼¼¸¦
³ªÅ¸³»°í ´ã°üÀÇ Æı«¿Í °£¹®¸ÆÀÇ ¼¶À¯È­¸¦ ³ªÅ¸³»´Â ¿ø¹ß¼º ´ã°ü¼º °£°æº¯Áõ(primary
biliary cirrhosis: PBC)°ú ÀÓ»óÀû, Á¶Á÷ÇÐÀû, »ý¹°ÇÐÀû ¾ç»óÀÌ È¥ÀçÇؼ­ ³ªÅ¸³ª´Â °æ¿ì°¡ ÀÖ
À¸¸ç, À̸¦ Áߺ¹ÁõÈıº(overlap syndrome)À̶ó ÇÏ°í PBCº¸´Ù ±× ¿¹ÈÄ°¡ ³ª»Û °ÍÀ¸·Î ¾Ë·Á
Á® ÀÖ´Ù. PBC¿Í AIH°¡ È¥ÀçµÇ¾î ÀÖ´Â ¾ç»óÀº Áߺ¹ÁõÈıºÀ̶ó´Â ¿ë¾î ¿Ü¿¡µµ ÀÚ°¡¸é¿ª¼º
´ã°ü¿°(autoimmune cholangitis), È¥ÇÕÇü(mixed type) µîÀ¸·Îµµ ºÒ¸®³ª ÀÚ°¡¸é¿ª¼º ´ã°ü¿°Àº
Ç÷ûÇÐÀûÀ¸·Î´Â AIH ¼Ò°ßÀ» º¸À̸鼭 Á¶Á÷ÇÐÀûÀ¸·Î´Â PBC¿¡ º¸´Ù °¡±î¿î °æ¿ì¸¦ ¸»Çϸç,
ÀÓ»óÀû, Ç÷ûÇÐÀûÀ¸·Î PBC¿¡ À¯»çÇϸ鼭 Á¶Á÷ÇÐÀûÀ¸·Î´Â AIH¿¡ ÇÕ´çÇÑ °æ¿ì¸¦ Áߺ¹ÁõÈıº
À̶ó°í ºÎ¸£±âµµ ÇÑ´Ù. PBC¿Í ¿øÀ§ ½Å¼¼´¢°ü»êÁõ(distal renal tubular acidosis), ¸·¼º»ç±¸Ã¼
½Å¿°(membrnous glomerulonephritis), ±¹¼Ò¼º »ç±¸Ã¼½Å¿°(focal glomerulonephritis) µîÀÇ ½Å
Àå ÁúȯÀÌ µ¿¹ÝµÈ º¸°íµéÀÌ ÀÖ¾úÀ¸³ª, PBC¿Í AIHÀÇ Áߺ¹ÁõÈıº°ú IgA½Åº´ÁõÀÌ µ¿¹ÝµÈ º¸
°í´Â ã±â ¾î·Á¿ü´Ù. ÀúÀÚ µîÀº ³»¿ø 2³â ÀüºÎÅÍ ½ÃÀÛµÈ Àü½Å ¼Ò¾ç°¨°ú ÇÇ·Î, Ȳ´Þ µîÀÇ Áõ
¼¼·Î ³»¿øÇÑ 40¼¼ ¿©ÀÚ È¯ÀÚ¿¡¼­ Ç×ÇÙÇ×ü °­¾ç¼º°ú °£Á¶Á÷ÀÇ Á¶°¢±«»ç¿Í ±³±«»ç µîÀÇ AIH
¼Ò°ß°ú AMA °­¾ç¼º°ú ¹Ýº¹ÀûÀÎ ¼Ò¾çÁõÀ» ÁÖÁõ»óÀ¸·Î ³ªÅ¸³»´Â PBC¸¦ ½Ã»çÇÏ´Â ¼Ò°ßÀ¸·Î
Áߺ¹ÁõÈıºÀ» È®ÀÎÇÏ°í, À°¾ÈÀû Ç÷´¢¿Í Áö¼ÓÀûÀÎ Çö¹Ì°æÀû Ç÷´¢·Î ½ÃÇàÇÑ ½ÅÀå Á¶Á÷°Ë»ç¿¡
¼­ IgA ½Åº´ÁõÀ» È®ÀÎÇÑ 1¿¹¸¦ °æÇèÇÏ¿´±â¿¡ ¹®Çå °íÂû°ú ÇÔ²² º¸°íÇÏ´Â ¹ÙÀÌ´Ù.
#ÃÊ·Ï#
The case in which patients present clinical, biological, and histological features of both
primary biliary cirrhosis (PBC) and autoimmune hepatitis (AIH) is rare. Such overlap
syndrome is believed to be associated with a poor prognosis. We report a case of
PBC-AIH overlap syndrome associated with IgA nephropathy. The patient showed
hepatitic and nephritic features including easy fatigability, necrosis and bridging necrosis.
The clinical data of high titers of antinuclear antibodies and antimitochondrial antibodies,
elevated serum IgM and recurrent pruritus, suggest mixed features of AIH and PBC.
IgA nephropathy was confirmed by renal biopsy. High dose of corticosteroids was
effective initially, but clinical symptoms were relapsed after tapering the administration
of corticosteroids. Thus, azathioprine was administered at a dose of 2 mg/kg/day. A
dramatic improvement was noted in clinical conditions and liver tests.

Å°¿öµå

Overlap syndrome; Primary biliary cirrhosis; Autoimmune hepatitis; IgA nephropathy;

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